an ignorant or totally uninformed person; ignoramus.
an agnostic.
(caps.)a member of a political partyprominent from 1853 to 1856, whose aim was to keep control of the government in the hands of native-born citizens: so called because members originally professed ignorance of the party's activities.
a person whose anti-intellectualism, xenophobia, and other political attitudes recall the Know-Nothings.